1、the dark unfathomed caves of ocean
海洋中幽深、黑暗的洞穴

2、The two separated shores mingle their voices in a song of unfathomed tears
遙相注目的兩岸在難以測度的深海淚歌中彼此唱和。

3、The two separated shores mingle their voices in a song of unfathomed tears.
遙相注目的兩岸在難以測度的深海淚歌中彼此唱和。

unfathomed翻譯